Transmission mechanism



' i. HUP?.

LTRANSMISSION MECH-Mum. APPUCATIONHLEU MARI-(5| 1920.

3 SHEETS-SHEET 1.

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i. HUP?. TRANSMISSION MECHANXSM.

APm'cAnoN mma nw. 15, 1920.

Patmmi May 99 M22 L HUPKP. TRANSMISSION .MECH'ANISWL APPLlcATioN 'mso MAR. xnlezo.

@mam 'gay 5 SSBEfS-SHEET 3.

I i Indem.

ravin Hors, or CHICAGO, rumors.

TRANSMISSION MECHANI/SM.

Specification of Letters Patent.

Patented May 9, 1922.

Application filed March 15, 1920. Serial No. 365,850.

To w72 whom t may concern:

Be it known that I, lRvIN HUrr, a citizen of the United States, and a resident of Chi cago, in the county of Cook and State of illinois7 have invented certain new and useful 'improvements in Transmission Mechanism,

the gears and enable the gears to be readily shifted for change in speed without any clashing of the gears and resulting. noise and damager` and which shall give the driver better control of the cai.' and at the same time lessen both the labor and skill required for its operation; all as hereinafter set forth and particularly pointed out in my claims.

in thc acconnmnying d rawings Figure 1 represents a longitudinal vertical section through my improved transn'iission andits enclosing casing.

Figure 2 is a cross sectional view on the line 2 2 of Figure l.

Figure B is a cross sectionalview on the line 3*3 of Figure 1.'

Figure l is a Side elevation of part of an automobile showing the application of my invention thereto as well as a 'method of operation.

The same reference numerals are used to indicate corresponding parts in the several views.

Referring to Figure 1` the various elements of my improved transmission are mounted and enclosed in a suitable 'casing comprising a lower body portion 15 and a top portion or cap 1G suitably secured thereto. casing is provided at its opposite ends with axially projecting hub formations 17 and 18, in the former of which is mounted the drive shaft 2() and in the latter of which is mounted the driven shaft 21a. ings for thc shafts include suitable anti-friction rollers 19 and 19". interposed between these twoshafts, and in axial line therewithl` is the splined transmission shaft 21, -iipon which are mounted the sliding gears of the transmission and the movable member of a This The bearrear clutch hereinafter described. The inf, ner or rear end of the drive shaft 20 is counterbored to receive the reduced forward end 2li: of the transmission shaft 2l, with suitable interposed bearings 25, while the inner orforward end of the driven shaft 211v is similarly connterbored to -receive the reduced rear end 26 of the transmission shaft 21, With suitable interposed bearings 27. Mounted in suitable bearings 23 in the lower part ofthe casing 15 is the countershaft 22 which carries the fixed or hon-sliding gears of the transmission. The largest of'tliese gears 29, secured to the Shaft 22 near its lefthand end, is in constant mesh with a pinion 28 secured to or formed upon the inner portion of the drive shaft 20, so that the countershaft is constantly driven by the shaft 20, when the latter is in motion, at -a lower rate of speed.

ln the transmission illustrated in the accompanying drawings provision is made for four forward speeds and a reverse, to which end there are mounted upon the transmission shaft 2l three sliding gears 30. 44 and 45,. adapted to cooperate, respectively. with the Athree gears 3G. 54 and 53 secured uponthe countershaft 22, the sliding gear tz'i'also cooperating with a gear on the shaft 22 through the medium of an intermediate gear 5G (Figure 3) when said intermediate gear is brought into mesh with the gears 45 and for reverse movement, as hereinafter def scribed.

The sliding gear 5%() is provided with internal clutch teeth 34 adapted to cooperate with external clutch teeth 35 formed upon the extreme inner or rear end of the drive 'shaft 20, to connect theA latter shaft directly left and engaged with the gear 54 the transmission shaft will be driven through the `gears 28, 29. 5t and 44 at second speed; and

when the gear is slid to the right and engaged with the gear 53 the shaft .21 will be driven through the gears 28, 29, and 45 at first or low speed.

The sliding gears are shifted :to their several positions for these respective speeds by means of a pair of shifters'32 and 4157,.l

mately one-half of the mounted upon rock shafts 33 and 48, respectively, and operated by cams on a camshaft .3T which. fon-illustration, is journaled 1n the upper part of the casing, above and parallel with the transmission shaft 21. The sliding gear 3'() is provided with a grooved hub 31 which is engaged on its opposite `sides by anti-friction rollers upon the lower ends of the shifter arms 32 depending from the rock shaft. 33, while t-he latter has projecting up-v wardly from it a single` arm 41 which carries at its upper end an anti-friction'roller engaging a circumferential groove 4() in a cam-member 38 on the shaft 3T, as shown in dotted lines in Figure 1. The groove in the eam-memher 3H comprises a truly circumlferential portion 40. constituting approxilength of the groove, an loff-set or cam portion 42 below the samel on one side of the cam member 38; and an' oppositely off-set or cam portion 43 upon the opposite side of the cam-lneniber. Then the upper end of the shifter-arm 41 is'engaged with the. circumferential portion 40 of'the groove the sliding gear 30 will be held in its middle or neutral position shown in Figurel. dien the cam-member 38 is turned to a position to engage the cam portion 4Q of the groove with the shifter arm the gear 230 will be slidto the right and engaged with the gear 36 on the countershaft 22 for third speed; a'nd when the cammember 3S isA further turned in the same direction.. so as to engage the portion 43 of the groove with the shifter arm, the gear 3() will be slid to the left and its internal clutclr teeth 34 engaged with the clutch teeth the drive shaft. for diiectdrive.

The sliding gears 44 by a single shifter, to which end they are `carried by a single hub or sleeve provided midway between them with a circumferential' groove 46 which is engaged upon its opposite sides by anti-'friction rollers carried. vby the lower ends of, two shifter arms 4T depending from" the rock shaft 48..4 Projecting upward from said shaft is an arm 49 carrying at its upper end an` anti-friction roller engaging a circumferential groove in a cam-member 39 on the shaft Il?. This lgroove is similar inI shape yto that in the camfmembel-,38. comprising a truly circumferential -portion 50 and two off-set or cam portions 51 and 52 on opposite sides of the cam-membcr 3.() and below the` portion 50 of the groove.

turned in a direction to engage the portion 5l ofthe groove with the upper end of' the arm 49 the gears 44 and 45 will be vslid to the right and the-gear 45 engaged with the gear 53 on thecounter-shaft 22. for first or cam-member is same direction until of the groove is engaged the end of the shifter arm the gears further turned in the the offsetportion 52 with and 45 are operated 'hen the cam-member 39 is 44 and 45 will be shifted to the left and the gear 44 engaged with the gear 54 on the counter-shaft 22, forsecond speed.

The shape and position of the groove in the cam-member 39 are, as stated, similar to those of the groove in the cam-member 38, but inasmuch as the shifter arms 4l and 49 are located on opposite sides of the camshaft, the arm 41 which cooperates with the groove in the cam-mernber 38 being located upon the vfurther side o f said member in Figure l, whereas the shifter arm 49 which cooperates with the groove in the cam-meinber 3ST is located uponthe near side of the member 39' in said view, the shifter operated by one cam member remains idle or neutral while the other cam member is operating its shifter. Thus, With all of t-he parts in neutral positon, as shown in Figure 1, if the cam-shaft and cam-members be turned in the. direction of the arrow upon the mem- Y ber $38 the shifter 32 which operates the sliding gear 3() will remain idle and unaffected by the turning of the cam-member 38 until the latter has been turned approximately that during such movement of the cain membefr the upper end of the shifter arm 41 will travel in'the truly circiunferential portion 4() of the groove in said member. During this-half of the revolution of the cam-shaft and cam-members` however, the gears 44 and 45 will be first slid to the right. to engage gear with the gear 53 .for first speed'` and then to the leftto engage the gear 44 with thef 'gear 54, for second speed. Further. turning movement of the cam-shaft and cam-memlwrs in ythe same direction will bring the truly circumferential portion 50 of the groove in the member 39 into engagement with the uppe'r end of 4S), restoring the gea-rs 44 and 45 to neutral position and holding them in that position while the shifter 41 cooperating with -the cam-member 38 is operated by the latter tol (Figure 3) for reverse is 'effected by a shifter v -arm 58provided with a forked lower end 59a carryijig shoes engaging a groove. in the hub of the gear 5G (Figures 2 and 3), said shifter arm 5S heilig' mounted upon a stud fpivot 5Sland provided with an upwardly extending portion 58 carrying an anti-friction roller engaging a second cam-groove (50. G0* '(.Figure l) in the cammemher 3S). 'hen the shifter arm the upper end of the arm 58a is engaged with the truly circumferential portionI GQ of said groove, as in Figure 1, the intermediate gear 56 will be held in neutral or idle position, but when the cam-shaft 37 is turned so as to bring the oset or cam portion 60L of the groove into engagement with the upper end of the arm 58a the gear 56 will be shifted into engagement with the gears L15v and 55, for reverse, will be noted, during the entire turning movement of the cam-shaft and cams from the neutral position of Figure 1 to the position for direct drive, as heretofore described, the roller on the upper end of the Shifter arm 58a will travel in the truly circumferential portion of the groove GO- in the cammember 39, leaving the shifter arm 58 and gear 5G at rest, whereas movement of them in the opposite direction from the position of Figure 1 will shift the gear 5G to position for reverse.

The rear end of the cam-member 39 on the shaft 37 is likewise formed, as shown in Figures 1 and 2, to cooperate as a cam with the upper end of 'an arm 67 fast upon and projecting upwardly from a rock-shaft 64 and comprising part of a clutch-shifter,y the remainder of which consists of two arms 63 depending from the rock-shaft 64 and carrying upon opposite sides of the transmission shaft 21 a pair of shoes which engage the grooved hub 62 of a clutch' member' 61 splined upon the shaft 21 and provided upon itsrear face with clutch teeth adapted to engage corresponding clutch teeth upon the forward face of a similar clutch member I 65 carried by or formed integral with the inner kend of the driven shaft 21a. One of the shifter arms G3 is 'provided with an extension 63a projecting some distance belo` the hub of the clutch member G1, andhaving connected to its lower end one en'd. of a strong coiled spring 66 whose opposite .end is secured to a. suitable ylined point on the casing. This spring tends to pull' the lower end of the shifter arm to thc right and engage the clutch member 61 with the clutch member (S5, and thereby connect the transmission shaft 21 with the driven shaft 21, but this movement of the clutch member 61 and engagement of the clutch is permitted only when the shaft 37 and cam-member 38 are turned to such position as to bring one or another of recesses 68 in the end of the cam-member 89 opposite the anti-friction roller carried by the upper end of the shifter arm 67. When this occurs the spring 6G is' permitted to pull the lower end of the shifter to the right and engage the clutch members, but the moment the shaft 37 and cam-mem ber 39 are turned from any such position,y

and the upper end of the'shifter arm G7 thereby forced to the right` as in Figure 1, the clutch member G1 will be disengaged as indicated in Figure 3. As

ment of the internal from the member-65 and the transmission shaft 21 thereby disconnected from the driven shaft 21a. The positions of the recesses 68 in, the end of the cam-member 39, and their relation to the cam grooves in said member and in the memb'er 38, are such that in all neutral and intermediate positions of the sliding gears of the transmission the` roller upon the upper end of the shifter arm 67 will be engaged with one of the surfaces of the cam-member 39 between the recesses 68, and the clutch member 61 be consequently held out of engagement with the clutch member 65, withthe transmission shaft 21 disconnected from the driven shaft 21a; but. whenever any one of the sliding gears is brought into active position,by complete engagement with one of the gears upon the countershaft 22, or by complete engageclutch of the gear 3() wit-h the clutch teeth 35 on the drive shaft 20, one of the recesses (i8 will be brought opposite the upper end of the shifter arm 67 and the spring 66 thereby permittedto engage the clutch members G1 and G5. and connect the transmission shaft (and consequently the drive shaft) with the driven shaft 21a. y

As will be understood from the foregoing, the first thing that occurs, when the camL shaft and cams are turned to shift the gears from one aetiveposition to another, is the bers (i1-G5 out of engagement with each A other; and when such shifting of the gears totheir new position is completed and the gears fully engaged for the changed speed, another' recess G8` inthe cam member 39 will be brought opposite the upper end of the shifter arm G7 and the spring (3G be permitted to thenre-engage the clutchmembcrs 61.-65 and re-connect the transmission shaft 21 with the driven shaft 21a. lnasmuch as Athe drive shaft 2l) (and consequently the transmission shaft 2l) will he disconnected from the engine shaftduring any such shifting of the gears. by the opening of the usual forward clutch interposed between the engine shaft and the shaft 20,

the transmission shaft will be left entirely i ed, without any clashing of the ears andresultlng noise and damage. heshifting from one sneed to another, in either direction, or a s ifting through a range of sev-V eral speeds in either direction, may be readily and smoothly effected while the car is traveling, at considerable speed, and the shifting from higher to lower speed may be f advantageously'employed for braking purposes.

The cam-shaft 37 vmay be turned, to'shiftv the gearsin the manner described, by any suitable means within reach of the driver at the steering wheel. I have shown one suitable provision for the purpose'in Figure 4 of the drawings, Where it will be seen that the cam-shaft 37 'carries upon its end projecting from the casing 16 a bevel gear 69 meshing with a bevel gear 70 upon the rear end of a shaft 71 suitably mounted in bearings upon the machine, and carrying at its `upper forward end a bevel gear72 meshing with a similar Oean 73 carried by the lower forward end of a' shaft 74 mounted at its upper and lowery ends `in bearings carried bythe steering post 73. Secured to the shaft 74 immediately `beneath its upper bearings is an operating handle 76 prov-ided with amindex or pointer 77 to copositions, and releasably held in any one of' such positions by the engagement of the spring detent'with the corresponding notch -in lthe edge of the sector 78. Any other 'suitable provision for turning they cam-shaft to its several positions, and releasably holding it therein, may manifestlybe employed.

l While I have shown and described what I vbelieve to be the simplest embodiment of my invention, modifications may be made in certain respects, without, however, departing from the spirit vof my invention; for example the cam-shaft37 need not necessarily be disposed in a horizontal plane above the driven-shaft, but may be arranged in a different plane; and the counter-shaft need not be disposed in a plane below that of the driven shaft; it being essential merely to so dispose the various shafts that proper operation of the ,various correlated elements is v possible; while at the same time different operating means from that disclosedin Figure 4 may. be employed .for lgiving' the fleslred rotation to cam-shaft 37.

1. Transmission mechanism of-the class described, comprising, a casing,A a powershaft rotatably mounted in one end Wall of said casing, a driven-shaft, rotatably mounted in the opposite end Wall of the casing, a transmission shaft, the inner end of the power-shaft being socketed to receive one end of the transmission shaft, While the inner end of the driven-shaft is socketed to receive the end of the transmission shaft, anti-friction bearings arranged in the end walls of the casings and in said socketed ends for the ends of the respective shafts, a counter-shaft mountedin said casin parallel with the other shafts, a plura ity of gears arranged on the power-shaft, the counter-shaft and the transmission shaft, with the gears on the power-shaft and counter-shaft being ixedly secured thereto and arranged in 'constant meshing relation, While the gears on the -transmission shaft are slid- Aably mounted thereon so as to permit them to be shifted into meshing relation with the gears on the power-shaft and the gears on the counter-shaft` oscillatingly mounted ele-- ments for controlling the slidably mounted gears on the transmission shaft, aA pair of clutchmembers arranged on the transmissioii shaft and the `driven-shaft, with the clutch member on the transmission shaft made slidable, a spring-controlled element v for normally moving the slidable clutch member into clutching relation with the fixedly mounted clutch member` a slidably mounted idler arranged in said casing and adapted to be moved into meshing relation with a gear on the counter-shaft and a gear on .the transmission shaft, an 'oscill'atingly mounted element for controlling said idler, and a rotatable-shaft arranged in said housing and provided with -a plurality of actuating surfaces at predetermined-points about its perimeter whereby one of'saidoscillatingly mounted elements and said spring-controlled element will be jointly actuated during different degrees of rotation of said rotatable shaft. the desired speed ratio thereby produced and clutching relation' between the clutch members permitted.

2. Transmission mechanism, comprising, in combination with a power-shaft, a transmission shaft, a driven-shaft and a countersha ft, a plurality of gears on the power-shaft, the counter-shaft and the transmission shaft, a slidably mounted idler adapted to-be moved into meshing relation with a gear yon the counter-shaft and a gear on the transmission shaft so as to provide reverse operation of the latter` sonie of the gears being slidably mounted, a clutch between the transmission shaft and the driven-shaft, a plurality of members yfor controlling the slidably mounted gears, said idler .and the clutch; and a rotatable shaft common to all of said members whereby different gear-controlling members. 1n conjunction with the clutch-controlling` vmember` are jointly actuated at predetermined periods in the rotation of said shaft.

v in combination with a power-shaft, a driven mission shaft and the adjacent ends ofthe l in the rotation of said member.

' with eircumferentially disposed s ots pro- 3. Transmission mechanism, comprising, vided with off-sets at different points relative to said oscillatingly mounted members, shaft and an aligned transmission shaft, the each slot being adapted to control one of the adjacent ends of the power-shaft and transoscillatingly mounted members, whereby mission shaft and adjacent ends of the transdifferent speed ratios are obtained at differmission shaft and the driven-shaft being arent periods in the rotation of said rotatable ranged in telescopic relation, a counter-shaft member. I

6. Transmission mechanism, comprising,

disposed parallel with both shafts, a plu-- rality of gears mounted on the power shaft, the transmission shaft and the counter-shaft, shaft, a transmission-sliaft aligned therewith some of the gears being loosely mountwith, and a counter-shaft, clutchmembers ed, clutch members between the transmission 'mounted on the transmission-shaft and on shaft and the driven-shaft, means whereby the diiven-shaft for. effecting operative relaoperative relation between the gears and betion between the shafts, a plurality of gears tween the clutch members may be effected, mounted on the power shaft, transmissionand a rotatable member provided with a shaft and the counter-shaft, the gears and plurality of actuating surfaces whereby preclutch member on the transmission-shaft beselected portions of said means will be a'cing slidably feathered thereon, with one of tuated at predetermined periods in the rosaid last mentioned gears being also adapted tation of said member. to directly couple the transmission-shaft to 4. Transmission mechanism, comprising, the powiersshaft, an idler gear adapted to be in combination with a power-shaft, a driven moved. into \ii-itlermeshing relation with a shaft and an aligned transmission shaft, the gearon the counter-shaft and a gear on the adjacent ends of the power-shaft and transtransmission-shaft for providingr reverse rotation of the transmission-shaft, a plu'- transmissionshaft and the driven-shaft being rality of membersfor controlling the slidarranged in telescopic relation, a counterably feathered gears and clutch member on shaft disposed parallel with both shafts,'a the transmission-shaft and said idler gear, plurality of gears mounted on the power anda rotatable member provided with a lCounter-shaft, plurality of cam-acting surfaces circumfershaft, transmission shaft and n with some of the gears being loosely mountentially disposed at different points relative to said second mentioned members, with ed, a loosely mounted idler gear adapted to be brought into meshing relation with agear"`each surface adapted to control one of said on the counter-'shaft and a gear on the trans- `second mentioned members, whereby differmission shaft, clutch members between the ent speed ratios and operative relation betransmission shaft and the driven-shaft, tweenrthe transmission-shaft and the drivenobtained at different periods in the in combination with a power-shaft, a drivenmeans whereby operative relation between` "shaft ai'e lthe gears, between the idler gear and some of rotation of said rotatable member.

lsaid gears and between the clutch members may be eifected, and a rotatable member provided with a plurality of actuating surfaces whereby pre-selected portions of said means shaft, clutch members mounted on the transwill he actuated at predetermined periods mission-shaft and the driven-shaft forcffeetfing' operative relation therebetween, a plufrality of gears mounted on the power-shaft, in combination with apowepghaftg-a transti'ansiiiission-shaft and the counter-shaft,

mission shaft, a driven-shaft and a counterthe gears andclutch member en the transshaft, a plurality of gears mounted on the" mission-shaft being slidably feathered therepower shaft, transmission shaft and 4the on, with one of said gears adapted todirpctly counter-shaft, the ,gears on the transmission-A couple the transmission-shaft,to the p( werin combination with a power-shaft, a transmission-shaft, a driven-shaft, and a counter- 5. Transmission mechanism, comprising,

.shaft being` slidably feathered thereon and shaft, an idler gear adapted to be moved arranged to move into intermesliing relation into intermeshing relation with a gear on with the gears on the coi'interi-slmsft, with the counter-shaft and a gear on the transone gear on` the transmission-shaft beinglalso .mission-shaft for providing reverse rotation adapted to directly couple the transmission-iwf the latter, a; plurality shaft'to the power-shaft, an idler gear adaptmounted members for controlling the),A slided to be moved into intermeshing relation able gears and clutch member oi'i the transwith a gear on the counter-shaft and a gear ii ission-shaft and said idler gear,-a rotatable on the transniission-shaft whereby reverse member provided with a plurality of olf-sets rotation of the transmission-shaft is induced, disposed at predetermined points circumfera'pluralityof oscillatingly mounted mementialiy about the member and adapted to bers for controlling the slidably feathered control the second mentionedmembers so as gears on thel transmission-shaft and said to provide different speed ratios and operaidler gear, andarotatable member rovided tive relation between the transmission-shaft and the driven-shaft at different periods in 7. Transiinssioii mechanism, comprising,

the rotation of said rotatable member, and means whereby rotation of said lastmember in the desireddirection and to the 'desired degree may be effected.

8. In a transmission mechanism, the (rohr,

bination of a transmission shaft and a driven shaft, a clutch interposed between `said shafts,1a counter-shaft, co-operating transmission-gears mounted,l upon the transmission shaft and uponI the counter-shaft,l respectively, and selectively engageable with each otherfor different speeds, means for shifting certain of. the transmission gears, and means for automatically opening the clutch as an incident to the shifting of saidY gears.

9. In a transmissionv mechanism, the combination of a transmission shaft and a driven shaft, a clutch interposed betweenl said shafts, a counter-shaft, co-operating transmission gears mounted upon the transmission shaft and upon the counter-shaft, respectively, and selectively engageable with each other for different speeds, means for shifting certain of said transmission gears, and means for automatically opening Vthe clutch at the 'beginning of the shifting of said gears, maintaining it open during their shifting movement, and automatically closing it at the end of such movement.

, '10. In a transmission mechanism, the combination of a transmission shaft and a driven-shaft, a clutch interposed between said shafts, a counter-shaft, co-operating transmission gears mounted upon the transmission shaft and upon the counter-shaft, respectively, and selectively engageable with each other for different speeds, a plurality of rotary cams, and a plurality of Shifters interposed between said cams, on the one hand, and certain of the transmission gears and the movable member of the clutch, on

the other hand, for selectively shifting the transmission gears and automatically opening the clutch as an incident to said shifting of the gears.

. 11. In a transmission mechanism, the combination of a transmission shaft and a driven shaft, a clutch interposed between said shafts, a counter-shaft, cooperatiig transmission gears mounted `upon the transmission shaft and upon the counter-shaft, respectively, and selectively engageable with each other for different speeds, a plurality of rotary cams, and a plurality of Shifters 'I interposed between said cams, on the one hand, and certain of the transmission gears and the movable member of the clutch, on the other hand, for selectively shifting the transmission gears and for automatically openingthe clutch at the beginning ofsuch shifting movement, maintaining it open during the shifting movement, and automatically closing it at the end thereof.

l2. In a transmission mechanism, vthe comsaid shafts,

bination'of a transmission shaft and a dri-ven shaft, a clutch interposed between said shafts, a counter-shaft, cooperating transmission gears mounted upon the transmission'l shaft and upon the counter-shaft, respectively, and selectively engagea-ble with each other for different speeds, means for opening and closing the clutch, and means for selectively shifting the transmission gears when, and -onl when, the\olutch 1s open and the two sha ts thereby disconnected from each other.

13. In a transmission mechanism, the comi bination of a transmission shaft and a' driven shaft, a clutch interposed between respectively, and selectively engageable with eachother for different speeds, and a manually operable device located within reach lof the driver at the steering wheel and operatively connected with the movable memmission gears for shifting said gears and w opening the clutch.

14. In a transmission mechanism, the combination of a transmission shaft and a driven shaft, a clutch interposed between a counter-shaft, co-operating transmission gears mounted upon the transmission shaft and upon the-counter-shaft, respectively` and selectively engageable with each other for differentV speeds, a. rotary camA shaft, a plurality of cams thereon,i Shifters interposed between said cams, on the one Vsaid shafts, a counter-shaft, co-operating v `transmission gears mounted uponV 1the trans /m-ission shaft and upon the counter-shaft,

`ber of the clutch and certain of the transhand, and certain of the transmission gears andthe movable memberof the clutch, en the other hand, for shifting said gears and opening the clutch, and a manually operable device located within reach of the driver at the steering wheel and geared to the cam shaft for operating the same.

15. In a transmission mechanism, the combination of a drive shaft, a driven-shaft and an intermediate transmission shaft` a clutch interposed between the drive shaft and the transmission shaft and a second clutch intei-posed between the transmission shaft and the driven-shaft, a countershaft permanently ligt?" geared to the drive shaft,l gears mounted in fixed position upon said counter-shaft, sliding gears mounted on the transmission shaft to turn therewith, means for opening and closing the clutch between the drive shaft,

and the transmission shaft and for selectively shifting the sliding gearsv uponthe transmission shaft into and out of engagement with the gears upon the counter-shaft. and means for automatically opening the clutch between the transmission shaft yand the driven-shaft as an incident vto the shifting of the gears. W

17. In a transmis-sion mechanism, the combination of a drive shaft, a driven-shaft and an intermediate transmission shaft, a clutch interposed between the drive shaft and the transmission shaft and a second clutch interposed between the transmission shaft and the driven-shaft, a counter-shaft` permanently geared to the drive shaft, gears mounted in fixed position upon said countershaft, sliding gears mounted on the transmission Shaft to turn therewith. a plurality of shifter-,operating cams. and Shifters interposed between said cams and the sliding," gears and the movable member of the clutch between the transmission shafti and the .driven shaft, for selectively shifting the Vsliding gears into and out of engagement with' the gears upon the. counter-shaft and automatically opening the clutch between the transmission shaft and the driven shaft as an incidentto the shifting of said gears.

1 8. In a transmission mechanism, the combination of a drive shaft, a driven-shaft andl an intermediate transmission shaft, a clutch interposed between the drive shaft and the transmission shaft and a second clutoh interposed between the transmission shaftand the driven shaft, :i counter-shaft permanently geared to the drive shaft, gears mounted in fixed position upon said counter shaft, sliding gears mounted on the transmission shaft to turn therewith, a cam shaft, a plurality of rains thereon. Shifters interposed between said cams, on the one hand, and. the vsliding gears of the transmission and the movable members of the clutches, on the other hand, for shifting the sliding gears and opening and closing the clutches, and a manually operable device located within reach of the driver at the steering wheel and geared to the cam shaftfor operating the saine.

19. ln a transmission mechanism, the combination of a drive-shaft, a driven-shaft, a transmission shaft arranged intermediate of said shafts, a counter-shaft arranged parallel with said shafts, transmission gears on the drive shaft, transmission shaft and the counter-shaft, cooperating gears on the drive sha-ft, transmission shaft and the countershaft, with the gears on the transmission shaft being slidable into and out of cooperating position, a clutch between the'l transmistransmission shaft, a plurality of elements 70 for moving the gears on the transmission shaft, the slidable clutch member and said idler gear, and a single rotatable member provided with cam surfaces whereby vthe clutch member is shifted out of operative position and the predetermined gear on the' transmission'shaft is moved to operative position when said single member is rotated in one ldirection and said clutch member shifted into inoperative position and the idler gear moved to operative position when said single member 1s rotated in the opposite direction.

20. Transmission mechanism, comprising,

.in combination with a drive shaft, a driven- Y shaft, a transmission shaft aligned therewith, and a counter-shaft. clutch members; y

mounted on the transmission shaft and the driven-shaft for effecting operative relation therebetween, a plurality of gears mounted on the drive shaft,ithe transmission shaft andthe counter-shaft, the gears and clutch member on the transmission shaft being slidably feathered thereon, with one of said last mentioned gears also "adapted to directly couple thel transmission shaft to the drive-Y shaft, a plurality of members for controlling the slidably feathered gears and said clutch member on the transmission shaft, and a rotatable member prov/ided with cam surfaces disposed eircumferentially thereaboutat different points 4relative to'said plurality of y members, with each cam surface adapted to control one of said last mentioned members whereby, at different periods in the rotation l' of said rotatable member, the clutch members are separated and a slidable gear is shifted. l

2l. Transmission mechanism of the character described, comprising ai, drive shaft, a driven-shaft, a transmission shaft disposed intermediate of the drive shaft and'drivenshaft with the ends thereof journaled in said shafts, a counter-shaft disposed parallel with said shafts, a clutch intermediate of 1,15.

the transmission shaft and driven-,shaft with one of the clutch members made'siidable and normally held iin clutching position,

gears arranged on the drive shaft, trans mission shaft and counter-shaft, with the gears von the transmission shaft being slidable thereon, an idler gear adapted `to .be brought into mesh with a gear on the transmission shaft and a gear on the counter'- shaft, shifter elements yieldingly mounted and arranged in controlling' relation with the slidable gears, idler gear and sliolable` clutch member, and a rotatable shaftpro vided with cam recesses disposed in a vcircumferential manner thereabout, each re- I cess beingrv adapted to operatively engage' one of the gears on with a shifter element,

whereby a predetermined shifter element.

will be moved at 'ment of the slidable gears and said idler,v

transmission shaft and the driven-shaft for operatively connecting said shafts, one portionv of said clutch being slidably mountedY and normally held in clutching position, gears on the end of the drive shaft, on the transmission shaft and on the counter-shaft, with the gears on the transmission shaft being loosely mounted thereon while those a gear on the adjacent end of the counter-shaft being 1s adapted to couple the transmission shaft to said driveshaft, an

mounted portion of said clutch whereby said gears and clutch portion are controlled,v and a rotatable member, common to all of said shifter elements, provided with a plurality of cam recesses on the other shafts,

y shaft. a clutch mech are non-shiftable, a gear on the drive shaft whereby the latter may be d y Wlth a gea-r on thev 'disposed eiroumterentially` the drive-shaft and the drive -shaft whereby the last mentioned shaft may be 'driven at and .a single operating ymember for said-clutch mechanism and all various speeds, A

of said elements,

arranged to actuate said clutch mechanism at a predetermined moment relative to its actuation of the preselected power-transmitting element.

Transmission mechanism, comprising a drive-shaft, a transmission shaft, a drivenn anism intermediate of the driven-shaft and thetransmission shaft, power-transmitting means intermediate of the. drive-shaft and the transmission shaft speeds, clutch predetermined movement to actuate saidv clutch mechanism vand eliect operative y r'gon' between the shafts through the sevll e power-transmitting means.

" IRVIN HUPP. Witnesses:

1F. A. Fmimnn,

G. HEIDMAN. 

